Abstract

Erythrinidae include Neotropical teleost fish that are widely distributed in South America. Hoplias Gill, 1903 include two large groups: H. malabaricus Bloch, 1794 and H. lacerdae Miranda Ribeiro, 1908. Hoplias malabaricus is characterized by remarkable karyotype diversity, with some karyomorphs widely distributed geographically while others are more restricted to certain river basins. Cytogenetic analyzes were performed in a population of Hoplias malabaricus from the Wildlife Refuge of Campos de Palmas, the Iguaçu River basin. The specimens showed diploid number of 42 chromosomes (24m+18sm) without differentiated sex chromosomes system. The impregnation by silver nitrate showed multiple AgNORs. Seven pairs (4, 7, 10, 13, 16, 20 and 21) carrying 18S rDNA were detected by FISH. Heterochromatin was verified in the centromeric and pericentromeric region of most chromosomes and the terminal region of some pairs. FISH with 5S rDNA probes showed two chromosome pairs carrying these sites in the interstitial region (8 and 14). The data obtained in this study are similar to those found for two other populations of H. malabaricus already studied in the basin of the Iguaçu River, confirming the hypothesis that this species is natural, notbeen introduced, as well asan intrinsic characteristic, such as the largest number of sites of 18S rDNA.

Addeddate

2025-03-14 22:03:29

Bhl_virtual_titleid

210879

Bhl_virtual_volume

v.8:no.3 (2014)

Call number

10_3897_compcytogen_v8i3_7084

Call-number

10_3897_compcytogen_v8i3_7084

Foldoutcount

0

Genre

article

Identifier

basiccytogeneti8marg

Identifier-ark

ark:/13960/s267t6cx8sr

Identifier-bib

10_3897_compcytogen_v8i3_7084

Identifier-doi

10.3897/compcytogen.v8i3.7084

Issue

3

Ocr

tesseract 5.3.0-6-g76ae

Ocr_detected_lang

en

Ocr_detected_lang_conf

1.0000

Ocr_detected_script

Latin

Ocr_detected_script_conf

1.0000

Ocr_module_version

0.0.21

Ocr_parameters

-l eng

Page_number_confidence

40

Page_number_module_version

1.0.5

Page_range

211-222

Pages

12

Pdf_degraded

invalid-jp2-headers

Pdf_module_version

0.0.25

Possible copyright status

In copyright. Digitized with the permission of the rights holder.

Ppi

300

Source

Comparative Cytogenetics 8(3)

Year

2014

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